Set new paramers for gov module in sdk v0.47 (#661)

# Description

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app/upgrade/v3/upgrade.go

@@ -161,9 +161,9 @@ func New(
 			// TODO(new-gov-params): Discuss new values for the following params with the team and set here & inside genesis.v3.json.
 			// min_initial_deposit_ratio, burn_vote_quorum, burn_proposal_deposit_prevote, burn_vote_veto
 			govParams := govKeeper.GetParams(ctx)
-			govParams.MinInitialDepositRatio = sdk.NewDec(0).Quo(sdk.NewDec(100)).String()
+			govParams.MinInitialDepositRatio = sdk.NewDec(50).Quo(sdk.NewDec(100)).String()
 			govParams.BurnVoteQuorum = false
-			govParams.BurnProposalDepositPrevote = false
+			govParams.BurnProposalDepositPrevote = true
 			govParams.BurnVoteVeto = true
 			if err := govKeeper.SetParams(ctx, govParams); err != nil {
 				return nil, err

integration-tests/upgrade/params_migration_test.go

@@ -169,9 +169,9 @@ func (pmt *paramsMigrationTest) After(t *testing.T) {
 		Quorum:                     pmt.govParamsBeforeMigration.TallyParams.Quorum.String(),
 		Threshold:                  pmt.govParamsBeforeMigration.TallyParams.Threshold.String(),
 		VetoThreshold:              pmt.govParamsBeforeMigration.TallyParams.VetoThreshold.String(),
-		MinInitialDepositRatio:     sdk.ZeroDec().String(),
+		MinInitialDepositRatio:     sdk.MustNewDecFromStr("0.5").String(),
 		BurnVoteQuorum:             false,
-		BurnProposalDepositPrevote: false,
+		BurnProposalDepositPrevote: true,
 		BurnVoteVeto:               true,
 	}
 	assertT.Equal(paramsBeforeMigration, govParams)